Antiskidding grip-tread.



H. D. WEED. ANTISKIDDING GRIP TRBAD. APPLICATION FILED FEB 24 1908 Patented Jan. 28, 1913.

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o 'aerative position strains in all directions in passing over obhire. ermine HARRY D, NEED, OF SYRACUSE, NEW YORK.

nnrrsnrionrne GRIP-TREAD.

Application filed February 24, 1908. Serial No, M'ZAM.

roar are To all whom it may concern Be it known that 1, Hanna? D. Waco, oi; Syracuse, in the county ot Onondaga, inthe Stateot New Yorln have invented new and useful improvements in Antiskidding;- Grip-Treads, of which the following, taken in connection with the accompanying draw ings, is a full clear, and exact description.

This invention relates to certain improvements in anti-skidding grip treads -for vehicle tires and is especially adapted for use in connection with solid rubber tires which are commonly employed for auto trucks and other heavy self--pr0pelled vehicles.

' The gripping or wearing elements are arranged'in circumferential series around and upon the tread of the tire and are held in by suitable attaching elements which together with the wearing elements are subjected to irregular and heavy of the grip tread or armor a whole.

in the following description.

In the drawings-Figures spccti'vely a top plan and-aside view 0t my improved anti-skidding grip tread as applied to the solid tire of a vehicle wheel. Fig. 3: is an enlarged transverse sectional view taken on line 3 3, Fig. Fig. 4 is a perspective view of one of the detached tread plates and attaching elements there-- for. Fig. 5 is a sectional view similar to Fig. 3 showing a. modified form of attaching element. p

In order to clearly demonstrate the practicability of my invention I have shown it as applied'to asolid rubber tire -l-- and as consisting of a series of substantially flat metal plates -2- arranged in circular series a suitable distance apart around and upon the periphery of the tire and held in place by attaching elements -3 and opposite circular side pieces -st, the latter being located at opposite sides of and within the periphery of the tireivhilc the attaching ?l6llllltf-l -3- for each plate are also located at opposite sides of the tire and serve as connections between the circular side pieces and ad jaccnt ends of the plates. The outer faces of these solid rubber tires are usually llat transverscly and the interstructions and uneven pavements and par ticularly when passing diagonally or other- Wise across or over street car tracks where the pavements and portions of the rails are always more or less depressed Unless these attaching elements are protected in some manner against undue wear and shearing; strains either by contactwith the pavement, rail or other obstacle or by impinging some part of the attaching elements between said rail or other obstacle and rim of wheel, there' is always more or less liability of shearing the attaching elements in two and thereby destroying the retaining means for the wearing plates. I

My main objectftherefore, is to make the upon the periphery of the tire are also flat transversely and CilCl'lllifGl'Olllltllly but their opposite ends which extend some distance beyond the opposite sides of the tires are gripping and attaching elements oi highly formed with lJ-shapcd slits thcrcthrough tenacious and durable nietalcapableot withforming loops -5 and tongues the standing the severe strains to which they are loops s being: depressed inwardly toward the center ot the wheel beyond the tongues -(3- which remain in the same plane as the intermediate portion of the plate,

The inner ends of the slits forming the groove ---5-- and tongue p terminate near the opposite edges of the periphery of the tire thus bringing the bend of the loops close to said edges so that when the loops subjected. and to protect the attaching;- elements so tar as practical against excessive shearing and other strains and also against undue wear by shielding them From contact l with the pavement and obstacles with which they would be liable to COlllQ'lli contact;

A further object is to make the elements rigid or continuous of the rim of the wheel at tar-hing the edges bcllcr rcion and limited play of the adjaet -t sist shearing strains between the rails or are deprc scd inwardly in the manner ust other obstacles and said rim. described they serve the double purpose of it still further object is to provide a limretaining); the plates against undue lateral ited play or freedom oft action of the wear- Q movement upon the periphery of the tire ing plates relative to the attas'zhing; element." and also leave sutlicicnt cl zaranee between so as to further relieve the latter :lroni excesthe loops -5-- and tongues -6-- for the sive strains, the general purpose being to rcce preserve the integrity andholdin elliciency Other objects and uses will be brought out l and 2 are remediate portions of the plates which rest till ping edges to prevent lateral skidding or attaching elements 3 as best seen in Figs. 3 and 4;

It is evident from the foregoing description that by bending the loops inwardly toward each other and toward the sides of. the tire while the tongues -6- remain in the same plane as the intermediate portion of the plate, the attaching ends of the loops are brought within the planes of the outer edges of the tongues and also within the circumferential plane of the plates or periphery of the tire so thatthe adjacent ends of the attaching elements are protected from wear by the tongues 6 which overhang said attaching ends and thereby serve as shields to protect the "attaching elements from contact with the pavement or obstacles over which the wheel passes and at the same time the laterally projecting ends of the tongues 6- serve as bit-in or grip- Y grades such as steep inclines where the pavement may be more or less mud, me or snow.

In Figs. 1 to 4 inclusive, I have shown slippery from the attaching elements -3- as consisting of metal links,"one pair for each plate, each link being provided at its o-pposite ends with hooks or eyes 7 and 8- which are hooked into the adjacent loop -5-- and T into one of the circular side pieces respectively. The circular side pieces -4- may be made of any suitable flexible material such as cables or chains which connect the attaching elements -3- atthe adjacent side of the wheel and are usually divided. at some point in their length and provided with suitable attaching elements as snap hooks .by means of which the entire grip tread may be readily attached to or removed from the tire at will.

In some instances, however, I may desire to hold each plate in place by an individual attaching element and for this purpose, I have shown in Fig. 5, one of the plates as held upon the periph- 9 having its opposite ends attached to links '8 on the inner ends of the parts --3- and its intermediate portion drawn under plates the rim as 10-- of the wheel and provided with a suit-able buckle -11 whereby the plate may be readily applied to or removed from the tire;

In the device shown in Figs. 1' to 3 inclu-i the entire grip tread including the -2-, attaching elements --3, and creep which sive,

circular side pieces are free to or shift position relatively to the tire prevents in a measurethe plates from embedding themselves into and unduly wearing the tire at any particular point and also enables the plates to better adjust themselves to any inequalities in the pavement at thetread of the tire toafiord a better grip upon the pavement. The eyes 7 and loops 5 with which they are interlocked are elongated in the direction of the length of the attaching elements to allow a limited radial play of the wearing plates and attaching elements relatively to each other or rather to allow a limited degree of radial movement of the wearing plates independently of the attaching elements when in action to relieve said attaching elements from excessive strains as would be the case if the connect-ion between the attaching elements and plate were rigid, it being understood that an open space is left between the inner faces of the plates and adjacent ends of the attaching elements for this purpose.

As best seenin Figs. 2, 3 and 5, the attaching elements .-3 consist of continuous rigid bars or links extending from the loops 5 inwardly across the edges of the rim as l2- of the wheel and this rigidity or continuity of the attaching elements enables them to encounter or contact with obstacles such as rails and the like under a glancing impact which prevents shearing of such elements between said obstacles and rim of the wheel as would be more liable to be the case if the. attaching elements were made of jointed parts or flexible between their points of attachment with the wearing plates and circular sidepieces. One of the eyes as the inner eye, of each of the attaching elements at one or both sides .of the wheel may be left open as shown in Fig. 3 to permit such attaching elements to be readily detached from or attached to the adjacent circular side piece.

It will be seen from the foregoing de'- scription that the essential purposes of my invention are: 1st, to protect the attaching elements from undue wear "by shields which extend beyond and overhang the adjacent ends of such attaching elements; 2nd, to make the attaching elements continuous and rigid across the edges of the rim of the wheel between their points of attachment with the wearing plate and side pieces for the purpose of affording glancing act with the rails and other obstacles with which they may be brought into contact and thereby avoiding liability of shearing such ele-' ments between the rail or other obstacle and rim of the wheel, and 3rd, to allow a limited radial play or freedom of action of the wearing plates. relatively to their attach elements so as to relieve said attachin elements from undue strains and permit the- -wearing plates to conform to une'ven sur faces over which they pass: a. I

What I claim is: 1. In a grip tread for tires, a tread plate having its opposite ends provided with U- shaped slits, the portions .at the outside of the slits being depressed inwardly to form loops,- and attaching members connected to said'loopsl 2.'In a grip tread'for tires, a series of flat plates arranged circumferentially,

around and upon the periphery of the tire, each plate having its opposite ends provided with U-shaped slits forming intervening attaching elements but apart therefrom.

3. In, a grip tread for tires, a series of plates arranged circumferentially around and upon the periphery of the tire and having their opposite sides provided with laterally pro ecting tongues and loops depressed Within the planes of the tongues, and attaching members having elongated slots in which the loops are inserted- 4. In combination with the rim and tire of a vehicle Wheel, a series of tread plates arranged circumferentially around and upon the periphery of the tire and having their opposite sides provided with laterally projecting tongues and loops extending laterally and inwardly-from the base of the tongues, and attaching members connected to said loops.

5. In combination with the rim and tire of a vehicle wheel, a series of plates arranged circumferentially around and u on the periphery of the tire and having t eir opposite sides provided with laterally proj ecting tongues and loops deflected inwardly beyond the planes of their corresponding tongues, attaching members having radially elongated eyes connected to said 100 s to permit relative radial movement 0 the plates and attaching members, and circular side pieces connecting the inner'ends of the attaching members.

In witness whereof I have hereunto set my hand this 19th day of Februar 1908. HARRY WEED.

Witnesses:

H. E. CHASE, C. M. MCCORMACK.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner ofLPatents,

Washington, D. O. 

